Poll tracking

• Gallup: Obama 50%, McCain 43%, with a ±2% margin of error, compared to a 50%-42% Obama lead yesterday.

• Rasmussen: Obama 51%, McCain 44%, with a ±2% margin of error, compared to a 51%-45% Obama lead yesterday.

• Hotline/Diageo: Obama 48%, McCain 41%, with a ±3.2% margin of error, unchanged from lead yesterday.

• Research 2000: Obama 52, McCain 40%, with a ±3% margin of error, unchanged from yesterday.